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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Synthesis and characterization of M2O-MgO-WO3-P2O5 (M = K, Rb, Cs) glass system
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Synthesis and characterization of M2O-MgO-WO3-P2O5 (M = K, Rb, Cs) glass system

机译：M2O-MgO-WO3-P2O5（M = K，Rb，Cs）玻璃体系的合成与表征

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摘要

Transparent glasses of the composition M2O-MgO-WO3-P2O5 (M = K, Rb, Cs), corresponding to the crystalline phases of M2MgWO2(PO4)(2), have been prepared and studied by Raman and IR spectroscopy as well as DTA. Moreover, the thermally stimulated depolarization and dc conductivity have been measured. The glass transition temperature is 797, 795 and 773 K for the K-, Rb- and Cs-containing glass, respectively. Raman and IR studies have shown that these glasses have very similar structure. The main building blocks are pyrophosphate groups, WO6 octahedra and magnesium-oxygen polyhedra. The dc conduction in these glasses is controlled by hopping of small polarons. The potassium containing glass was shown to be very stable whereas the rubidium and cesium glasses have significantly higher tendency for crystallization and phase separation. It seems, therefore, that the potassium containing glass is a suitable material for the preparation of samples containing non-linear and ferroelectric nanocrystals of the K2MgWO2(PO4)(2) phosphate. (c) 2006 Elsevier B.V. All rights reserved.
机译：制备了由M2O-MgO-WO3-P2O5组成的透明玻璃（M = K，Rb，Cs），对应于M2MgWO2（PO4）（2）的晶相，并通过拉曼光谱和红外光谱以及DTA进行了研究。 。此外，已经测量了热激发的去极化和直流电导率。含K，Rb和Cs的玻璃的玻璃化转变温度分别为797、795和773K。拉曼和红外研究表明，这些眼镜具有非常相似的结构。主要组成部分是焦磷酸盐基团，WO6八面体和镁-氧多面体。这些眼镜中的直流电传导是通过跳动小极化子来控制的。已显示含钾玻璃非常稳定，而the和铯玻璃则具有明显更高的结晶和相分离趋势。因此，似乎含钾玻璃是用于制备包含磷酸K2MgWO2（PO4）（2）的非线性和铁电纳米晶体的样品的合适材料。 （c）2006 Elsevier B.V.保留所有权利。

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